Didn't have any sunrises handy but figured a sunset would do . Here's a shot of the Bluewater Bridge, linking Ontario to Michigan, from the Canadian side. The sunset turned out to be not very colourful so I thought I'd see if this technique helped. Did modify the colours on the gradient map a bit and painted on the layer mask to bring some blue back into the blue water. Nice easy technique and lots of possibilities for both sunrises and sunsets
Here are the Before and After
Thanks for finding this one - it could be very useful as I have lots of sunsets that never got very colourful (but not many sunrises - early to bed, late to rise ...)
I guess I must not be an early riser because I don't seem to have a sunrise photo either. This is a sunset shot at Perdido Key, FL. I did not vary from the tutorial only changing the opacity of the gradient map.